Kernel panic - not syncing: corrupted stack end detected inside scheduler CPU: 1 PID: 17521 Comm: syz-executor3 Not tainted 4.20.0-rc7+ #376 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 panic+0x2ad/0x55c kernel/panic.c:188 schedule_debug kernel/sched/core.c:3285 [inline] __schedule+0x21c6/0x21d0 kernel/sched/core.c:3394 preempt_schedule_common+0x1f/0xe0 kernel/sched/core.c:3596 preempt_schedule+0x4d/0x60 kernel/sched/core.c:3622 ___preempt_schedule+0x16/0x18 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] _raw_spin_unlock_irqrestore+0xbb/0xd0 kernel/locking/spinlock.c:184 __debug_object_init+0x57d/0x1290 lib/debugobjects.c:418 debug_object_init_on_stack+0x19/0x20 lib/debugobjects.c:446 init_timer_on_stack_key+0x30/0xe0 kernel/time/timer.c:737 schedule_timeout+0x12e/0x260 kernel/time/timer.c:1802 io_schedule_timeout+0x26/0x80 kernel/sched/core.c:5125 mempool_alloc+0x3e6/0x4a0 mm/mempool.c:429 bio_alloc_bioset+0x3a8/0x700 block/bio.c:489 bio_clone_fast+0x26/0x110 block/bio.c:629 bio_split+0x86/0x260 block/bio.c:1802 blk_bio_segment_split block/blk-merge.c:231 [inline] blk_queue_split+0xa22/0x20f0 block/blk-merge.c:262 blk_mq_make_request+0x2e9/0x2590 block/blk-mq.c:1840 generic_make_request+0x9b1/0x18a0 block/blk-core.c:2452 submit_bio+0xba/0x460 block/blk-core.c:2560 mpage_bio_submit fs/mpage.c:66 [inline] do_mpage_readpage+0x169a/0x24d0 fs/mpage.c:316 mpage_readpages+0x56c/0x950 fs/mpage.c:404 blkdev_readpages+0x2c/0x40 fs/block_dev.c:578 read_pages+0x13a/0x680 mm/readahead.c:123 __do_page_cache_readahead+0x499/0x810 mm/readahead.c:209 ra_submit mm/internal.h:66 [inline] do_sync_mmap_readahead mm/filemap.c:2371 [inline] filemap_fault+0xf4e/0x25f0 mm/filemap.c:2447 __do_fault+0x100/0x6b0 mm/memory.c:2996 do_shared_fault mm/memory.c:3463 [inline] do_fault mm/memory.c:3538 [inline] handle_pte_fault mm/memory.c:3765 [inline] __handle_mm_fault+0x3cac/0x5be0 mm/memory.c:3889 handle_mm_fault+0x54f/0xc70 mm/memory.c:3926 do_user_addr_fault arch/x86/mm/fault.c:1423 [inline] __do_page_fault+0x5e8/0xe60 arch/x86/mm/fault.c:1489 do_page_fault+0xf2/0x7e0 arch/x86/mm/fault.c:1520 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:181 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff8880a3ee7010 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000001000 RCX: 00000000000003fa RDX: 0000000000001000 RSI: ffff888124af3c06 RDI: 000000002000f000 RBP: ffff8880a3ee7048 R08: 0000000000000000 R09: 0000000000000040 R10: ffffed102495e7ff R11: ffff888124af3fff R12: 000000002000f3fa R13: 000000002000e3fa R14: ffff888124af3000 R15: 00007ffffffff000 copy_page_to_iter_iovec lib/iov_iter.c:209 [inline] copy_page_to_iter+0x447/0x1000 lib/iov_iter.c:879 generic_file_buffered_read mm/filemap.c:2112 [inline] generic_file_read_iter+0xcf0/0x2d70 mm/filemap.c:2289 blkdev_read_iter+0x120/0x190 fs/block_dev.c:1936 call_read_iter include/linux/fs.h:1851 [inline] do_iter_readv_writev+0x77c/0xa80 fs/read_write.c:678 do_iter_read+0x26e/0x650 fs/read_write.c:922 vfs_readv+0x175/0x1c0 fs/read_write.c:986 do_preadv+0x1cc/0x280 fs/read_write.c:1070 __do_sys_preadv fs/read_write.c:1120 [inline] __se_sys_preadv fs/read_write.c:1115 [inline] __x64_sys_preadv+0x9a/0xf0 fs/read_write.c:1115 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff737dcdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457669 RDX: 0000000000000001 RSI: 0000000020000040 RDI: 0000000000000005 RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 00007ff737dce6d4 R13: 00000000004c39bb R14: 00000000004d63c8 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..